Volatile composition dispenser

ABSTRACT

A method of manufacturing a volatile composition dispenser is disclosed. A container is positioned on a pallet, wherein the container has a bottom wall and side walls extending circumferentially around the bottom wall to define a reservoir and wherein the side walls have a circumferential inner edge defining a reservoir opening. The pallet is moved to a filling station in fluid communication with a tank containing a perfume composition. The perfume composition is dispensed into the exposed reservoir. A vapor impermeable substrate is attached to the planar surface of the container containing the dispensed perfume composition.

FIELD OF THE INVENTION

The invention relates to a volatile composition dispenser and methods ofmaking the same.

BACKGROUND OF THE INVENTION

A conventional liquid air freshener has a liquid perfume delivery enginehoused in a housing wherein the housing has one or more apertures fordelivering air freshening benefits. The perfume delivery engine is madeup of a container containing a liquid perfume, a foil sealably attachedto the container to prevent diffusion of vapor phase from the perfumefrom the container before use and a membrane arranged within thecontainer for allowing vaporization of the perfume after the foil isruptured or removed. To manufacture the delivery engine, the containeris filled with the liquid perfume and sealed with the foil.

However, when the containers containing the liquid perfume are shaken orcaused to shake during manufacturing prior to a process of sealing thecontainer containing perfume with the foil, the movement causes movementof the perfume in the containers which may result in perfume splashedonto surfaces in the container designed for subsequent secondary processsteps such as for example, attaching of the foil or further to thecontainer. Still further, the perfume may also splash onto the membranethereby resulting in scrapping of such delivery engines with membraneswith the perfume splash prior to use.

Accordingly, there is a need to have a volatile composition dispenserwith improved manufacturability and a method for sequentially fillingperfume in a container for a perfume delivery engine at an increasedproduction rate minimizing perfume splash.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a side cross section view of a volatile composition dispenseraccording to the present invention in a horizontal orientation when thedispenser is placed on a support;

FIG. 2A is a top view of a container of the volatile compositiondispenser of FIG. 1 ;

FIG. 2B is a side cross section view of the container of FIG. 2A;

FIGS. 3A and 3B are schematic diagrams showing the perfume compositionin the container of FIG. 2A before and after subjected to horizontalacceleration in a method of manufacturing a volatile compositiondispenser according to the present invention;

FIGS. 4A, 4B and 4C are schematic diagrams showing steps of a method ofmanufacturing a volatile composition dispenser according to the presentinvention;

FIG. 5A is a side section view of an assembled volatile compositiondispenser according to the present invention in a horizontal orientationwhen the dispenser is placed on a support;

FIG. 5B is a partial perspective view of the volatile compositiondispenser in a vertical orientation when the dispenser is placed on asupport;

FIG. 6 is a side section view of a variation of a container of avolatile composition dispenser according to the present invention in ahorizontal orientation when placed on a support;

FIG. 7A is a perspective view of a variation of a container of avolatile composition dispenser according to the present invention in avertical orientation when placed on a support;

FIG. 7B is a side cross section of the container of FIG. 7A;

FIG. 8A is a perspective view of a variation of a container of avolatile composition dispenser according to the present invention;

FIG. 8B is a side cross section of the container of FIG. 8A;

FIG. 9 is a side cross section of a conventional dispenser;

FIG. 10 is a side section view of components of a variation of avolatile composition dispenser according to the present invention; and

FIG. 11 is a side section view of a variation of a volatile compositiondispenser according to the present invention.

DETAILED DESCRIPTION OF THE INVENTION

The present invention relates to a volatile composition dispenser(hereinafter “dispenser”) with splash control design features and methodof manufacturing a volatile composition dispenser. Specifically, thedispenser comprises a reservoir for receiving a perfume composition. Thedispenser comprises a container having a bottom wall and side wallsextending from the bottom wall to create the reservoir. The side wallshave a circumferential inner edge defining a reservoir opening and areservoir opening plane extends across the reservoir opening andintersects the circumferential inner edge. The reservoir opening planehas a center longitudinal axis extending along a length of the reservoiropening plane between opposing circumferential inner edges and extendingthrough a centroid of the reservoir opening plane. A first depth (D1)and a second depth (D2) between the bottom wall and the reservoiropening plane is measured orthogonal to the longitudinal axis. D1 ismeasured ⅕ of the length from a first circumferential inner edge and D2is measured ⅘ of the length from the first circumferential inner edge.D1 is longer than D2 to define an asymmetric profile of the bottom wall,thereby enabling control of perfume splash from the reservoir duringtransport of the container in the method of manufacturing the dispenser.

In the following description, the dispenser described is a consumerproduct, such as an air freshener, for evaporating a perfume compositionin spaces to deliver a variety of benefits such as freshening, malodorremoval or scenting of air in spaces such as rooms in household andcommercial establishments, or enclosed spaces such as a vehiclepassenger compartment space. However, it is contemplated that thedispenser may be configured for use in a variety of applications todeliver volatile materials to the atmosphere and the dispenser mayinclude but is not limited to consumer products, such as, for exampleair freshening products. Further, the container described has areservoir opening having a substantially elliptical shape. However, itis contemplated that the container may be configured in a variety ofgeometrical shapes including but not limited to squares, rectangles,polygons, circles, or the like.

Prior to describing the present invention in detail, the following termsare defined for clarity. Terms not defined should be given theirordinary meaning as understood by a skilled person in the relevant art.

“Horizontal orientation” as used herein, refers to a position of avolatile composition dispenser according to the present inventionwherein the membrane is facing the environment in an upward or downwardposition.

“Membrane” as used herein, refers to a semi-permeable material whichallows some components of matter to pass through but stops othercomponents. Of the components that pass through, the membrane moderatesthe permeation of components i.e. some components permeate faster thanother components. Such components may include molecules, ions orparticles.

“Microporous membrane” as used herein, refers to a material having anetwork of pores.

“Vertical orientation” as used herein, refers to a position of avolatile composition dispenser according to the present inventionwherein the membrane is facing the environment in a forward facingposition or in a rear facing position.

FIG. 1 is a side section view of a volatile composition dispenser 1(hereinafter “dispenser”) according to the present invention in ahorizontal orientation when the dispenser 1 is placed on a support. Thedispenser 1 can be constructed as a disposable, single-use item or onethat it is replenished with a volatile composition including but limitedto a perfume composition. The dispenser 1 comprises a container 10having a bottom wall 20 and side walls 22 extending circumferentiallyaround the bottom wall 20 to define a reservoir 11 for containing aperfume composition 12.

The container 10 may be made of a substantially vapor impermeablematerial designed to resist diffusion of a vapor phase of the volatilecomposition 12. For example, the container 10 may be made of metal,glass, ceramic, porcelain, tile and plastic including but not limited tothermoplastics and other known materials suitable for thermoforming,injection molding and blow molding.

A membrane 13 may be disposed within the container 10 and arranged to bein fluid communication with the perfume composition 12. The dispenser 1may further include a vapor impermeable substrate 14 adjacent to themembrane 13 wherein the vapor impermeable substrate 14 is configured toprevent release of the perfume composition 12 before use.

Referring to FIG. 1 , the vapor impermeable substrate 14 may bereleasably attached to an outer periphery 15 of the container 10 to forma removeable cover for the dispenser 1. The vapor impermeable substrate14 may be rupturable to allow the perfume composition 12 to pass throughwhen ruptured. For example, as shown in FIG. 4C, FIG. 10 , the vaporimpermeable substrate 14 may be a rupturable substrate disposed adjacentto the membrane 13 and attached to an inner periphery of the container10 to form a sealed perfume reservoir adjacent the membrane 13.

FIG. 2A is a top view of a container 10 of the dispenser 1 of FIG. 1 andFIG. 2B is a side cross section view of the container 10. Referring toFIG. 2A, the side walls 22 have a circumferential inner edge 24 defininga reservoir opening 26. A planar surface 28 radially projects outwardfrom the circumferential inner edge 24. The planar surface 28 mayfurther comprise a circumferential outer edge 25 opposing thecircumferential inner edge 24 to define a planar surface area, A thereinbetween. The planar surface area A is configured for attaching the vaporimpermeable substrate 14 in a configuration of a dispenser 1 such asshown in FIG. 11 . The planar surface area A may also be configured forattaching the membrane 13 in a configuration of a dispenser such asshown in FIG. 1 .

Referring to FIG. 2A, the reservoir opening 26 comprises a reservoiropening plane 27 having a center longitudinal axis Y_(C) extending alonga length, L of the reservoir opening plane 27 between opposingcircumferential inner edges 24 and through a centroid, C of thereservoir opening plane 27. Referring to FIG. 1 , the reservoir openingplane 27 is represented by a dotted line and a perfume surface level 16of the perfume composition 12 in FIG. 1 is substantially horizontal. Theperfume composition 12 is configured in an amount to define a head space17 between the reservoir opening plane 27 and the perfume surface level16 of the perfume composition 12. In FIG. 2A, the circumferential inneredges 24 may comprise a pair of opposing circumferential inner edges241, 242, and another pair of opposing circumferential inner edges 243,244. The circumferential inner edges 241, 242, 243, 244 are shown as acontinuous circumferential edge as the reservoir opening plane 27 isshaped in a substantially elliptical shape. However, it will beappreciated that the circumferential inner edges may be easilyconfigured to form other geometrical shapes such as a rectangular, asquare, or other known shapes.

Referring to FIG. 2B, a first depth (D1) between the bottom wall 20 andthe reservoir opening plane 27 is measured orthogonal to the centerlongitudinal axis Y_(C) and ⅕ of the length from a first circumferentialinner edge 241, and a second depth (D2) between the bottom wall 20 andthe reservoir opening plane 27 is measured orthogonal to the centerlongitudinal axis Y_(C) and ⅘ of the length from the firstcircumferential inner edge 241 such that D1 is greater than D2 to definean asymmetric profile of the bottom wall 20. A center latitudinal axis Xextends along a width, W of the reservoir opening plane 27 betweenopposing circumferential inner edges 241, 242 and through the centroid,C forming a 90-degree angle with the center longitudinal axis. Thereservoir 11 may comprise a length, L to width, W ratio from about 2:1to about 7:1, preferably from about 3.5:1 to about 6.5:1, morepreferably from about 4:1 to about 5.5:1. D1 and/or D2 may extend alongthe width, W of the reservoir opening plane 27 to define a flat surfaceacross the center latitudinal axis X. Having the flat surface at thebottom wall 20 of the container 10 enables ease of making a pallet forpositioning the container 10 within the pallet for transporting thecontainer in a method of manufacturing a dispenser according to thepresent invention. An exemplary pallet is shown in FIGS. 4A, 4B, 4C.

Further, the side walls 22 include a first side wall 221 proximal to thefirst circumferential inner edge 241 and a second side wall 222 opposingthe first side wall 221. The first side wall 221 is longer than thesecond side wall 222. As shown in FIG. 2B, the first side wall 221 isproximal to said first circumferential inner edge 241 and the secondside wall 222 is proximal to a second circumferential edge 242, whereinthe center longitudinal axis (Y_(C)) intersects the firstcircumferential inner edge 241 and the second circumferential inner edge242. The height of the first side wall 221 is measured orthogonal to theintersection of the center longitudinal axis (Y_(C)) and the first innercircumferential edge 241 and the height of the second side wall 222 ismeasured orthogonal to the intersection of the center longitudinal axis(Y_(C)) and the second inner circumferential edge 242. The height of thefirst side wall 221 may be longer than the height of the second sidewall 222, preferably the first side wall 221 is at least 10%, morepreferably at least 15%, yet more preferably at least 20%, longer thanthe second side wall 222. However, the first side wall 221 may have thesame height as the second side wall 222 such as for example, as shown inFIG. 6 .

Further, as shown in FIG. 2B, the container may further comprise a thirddepth (D3) between the bottom wall 20 and the reservoir opening plane 27measured orthogonal to the longitudinal axis Y_(C) and ⅗ of the length,L from the first circumferential edge 241. D3 may be configured lessthan D1 and greater than D2 to define a sloped profile of at least aportion of the bottom wall 20.

A technical effect of the geometry of the container 10 is to provide areservoir with varying depths, and preferably with side walls ofdifferent lengths for containing the perfume composition which minimizesor prevents perfume splash in a method of manufacturing a volatilecomposition dispenser 1.

To explain the way the container 10 works to prevent splash according tothe present invention, it is helpful to understand how forces acting onthe perfume composition 12 is generated during movement of the container10 in a horizontal direction such as when the container 10 is conveyedon a conveyor belt in manufacturing. FIGS. 3A to 3C are schematicdiagrams showing the container 10 comprising the perfume composition 12after a step of dispensing the perfume composition 12 and beforeattaching a vapor impermeable substrate 14 to the container 10 inaccordance with a method of manufacturing a volatile compositiondispenser according to the present invention.

In FIGS. 3A and 3B, the container 10 is in a substantially horizontalposition when placed on a support. The support may be a pallet 30 havinga surface 30 a, sized, spaced and positioned for transporting acontainer 10 during the course of manufacturing a volatile compositiondispenser 1, such as shown in FIG. 4A. FIG. 3A illustrates the container10 comprising the perfume composition 12 at rest on a conveyor belt 32after a step of dispensing the perfume composition 12. A perfume surfacelevel 16 of the perfume composition 12 in FIG. 3A is substantiallyparallel to the reservoir opening plane 27. Referring to FIG. 3A, theperfume composition 12 has a total perfume fill volume, V_(FILL)configured to provide a head space 17 in the dispenser 1, wherein thehead space 17 is between the perfume surface level 16 and the reservoiropening plane 27. The first side wall 221 of the container 10 faces theright side and the second side wall 222 faces the left side. Referringto FIG. 3B, when the container 10 is moved on the conveyor belt carryingthe container 10, the movement of the container 10 generates anacceleration force Fx. In FIG. 3B, Fx is acting in a direction inwardsinto the paper. When the conveyer belt is stopped for positioning thecontainer 10 at a next station for attaching the vapor permeablesubstrate 14 or the membrane 13, the perfume composition 12 in thecontainer 10 experiences an acceleration and therefore, the perfumesurface level 16 may be tilted at an angle, θ with respect to thereservoir opening plane 27 due to the horizontal acceleration force Fxin the perfume composition 12. Specifically, the perfume surface level16 drops relative to the reservoir opening plane 27 at the first sidewall 221 of the container 10 and rises relative to the reservoir openingplane 27 at the second side wall 222 of the container 10.

Without wishing to be bound by theory, a technical effect of having D1longer than D2 enables a head space 17 sufficient for minimizing splashwhen the container containing the perfume composition is moved afterfilling and stopped at the next station for subsequent process steps ina method of manufacturing a volatile composition dispenser according tothe present invention.

FIGS. 4A, 4B and 4C are schematic diagrams showing steps of a method ofmanufacturing a volatile composition dispenser 1 according to thepresent invention. The dispenser 1 described with respect to FIGS. 4A,4B and 4C have substantially the same components as the dispenser 1 ofFIG. 9 . However, it will be clear from the following description thatthe method can be easily modified for manufacturing the dispenser 1 ofFIG. 1 . FIG. 4A illustrates a first step 4A of the method in which thecontainer 10 is positioned on a pallet 30 such that the bottom wall 20is adjacent to the pallet 30 and the reservoir opening plane 27 facesupward away from the pallet 30 and perfume composition 12 is dispensedinto the container 10 through a nozzle 31 in fluid communication with atank 33 containing perfume composition 12.

The perfume composition 12 may be dispensed up to a level to define ahead space 17 between the perfume surface level 16 and the reservoiropening plane 27. A total perfume fill volume, V_(FILL) of the perfumecomposition 12 may be 75%, preferably 70%, more preferably 65%, yet morepreferably 60% of a total internal reservoir volume, V_(r) of thereservoir 11. The total internal reservoir volume, V_(r) is defined asV_(r)=Surface Area (S.A.) of the reservoir opening plane×Average Depth(Avg. D.) of the reservoir.

The head space 17 comprises a headspace volume of at least 25%,preferably at least 30%, more preferably at least 35%, even morepreferably at least 40% of the total internal reservoir volume, V_(r).An advantage of having the minimum headspace volume in the abovedescribed percentages is that it enables the conveyor belt to beoperated at a maximum line speed to increase production output of thedispensers' and minimizing perfume splash. The surface area (S.A.) ofthe reservoir opening plane 27 depends on a geometry or shape of thereservoir opening plane 27. For example, referring to FIG. 2A, thereservoir opening plane 27 has an elliptical shape and the surface areaof the reservoir opening plane 27 will be calculated accordingly basedon known mathematical formulae. The perfume composition 12 may beconfigured in an amount from about 2 ml to 50 ml, preferably 4 ml to 30ml, more preferably 6 ml to 20 ml, even more preferably 6.5 ml to 8 ml.Optionally outflow from the nozzle 31 may be directed in closerproximity to D1 compared to D2 to minimize splash during filling.

FIG. 4B illustrates a second step 4B of the method in which thecontainer 10 containing the perfume composition 12 is transported to astation for attaching a vapor impermeable substrate 14 to the planarsurface 28 of the container 10. As described in the above with respectto FIGS. 3A, 3B and 3C, perfume splashing is minimized between steps 4Aand 4B thereby enabling an optimal perfume fill volume and preventperfume splash on the planar surface 28 of the container 10 forattaching the vapor impermeable substrate 14, as well as preventingsplash on an outer periphery 15 of the container 10.

FIG. 4C illustrates a third step 4C in which the membrane 13 is attachedto the container such that the vapor impermeable substrate 14 is betweenthe reservoir opening plane 27 and the membrane 13. The method mayinclude an optional step of placing a rupture mechanism 50 as describedwith respect to FIG. 9 prior to step 4C, such that the rupture mechanism50 is disposed between the membrane 13 and the vapor impermeablesubstrate 14.

The conveyor belt 32 may be operated at a line speed of greater than orequal to 14 cycles per minute, preferably 14 to 20 cycles per minute,more preferably 16 to 20 cycles per minute, yet more preferably 18 to 20cycles per minute. An effect of operating the conveyor belt at a linespeed of 20 cycles per minute is that it enables an increased productionoutput relative to a lower line speed which will require addition of newlines to achieve the same increased production out, thereby enabling asavings in capital investments.

FIG. 5A is a side section view of an assembled dispenser 1 according tothe present invention in a horizontal orientation when the dispenser 1is placed on a support and FIG. 5B is a side section view of thedispenser 1 in a vertical orientation when the dispenser 1 is placed ona support.

Referring to FIG. 5A, the surface area (S.A.) of the reservoir openingplane 27 comprises a first surface area, SA₁ and a second surface area,SA₂, wherein SA₁ is based on ⅕ of the length from the firstcircumferential inner edge 241 to define a reservoir deep region 111 andSA₂ is based on ⅘ of the length from the first circumferential inneredge 241 to define a reservoir shallow region 112 relative to thereservoir deep region 111, wherein SA₁<SA₂. Further, the head space 17has a total head space volume, V_(H), between the perfume surface level16 and the reservoir opening plane 27. There is a first perfume volumeV₁ in the reservoir shallow region 112 and SA₂ of the reservoir openingplane 27. There is a second perfume fill volume V₂ in the reservoir deepregion 111, wherein total perfume fill volume, V_(FILL)=V₁+V₂, assumingno loss of perfume composition due to splash.

Further, the head space volume comprises a first head space volume,V_(H1), wherein V_(H1) is defined asV_(H1)=Total internal reservoir volume V_(r)−Volume of the perfumecomposition in the reservoir shallow region;

wherein V_(H1) is less than or equal to a Volume of the perfumecomposition V₂ in the deep reservoir region;

wherein the total perfume fill volume, V_(FILL) is defined as totalperfume fill volume=Volume of the perfume composition in the reservoirshallow region+Volume of the perfume composition in the reservoirshallow region.

Preferably, V_(H1) is at least 1 ml, more preferably V_(H1) is from 1 mlto 3 ml.

Specifically, referring to FIG. 5B, the dispenser 1 is positioned in avertical orientation such that the reservoir shallow region 112 isadjacent to the support supporting the dispenser 1 and the reservoirdeep region 111 is above the reservoir shallow region 112. In thisvertical orientation, the second perfume fill volume V₂ moves into thehead space volume V_(H) to set a vertical level 121 of the perfumecomposition 12 in the dispenser 1. For example, if V_(FILL)=6.5 ml, V₂may be configured to be less than or equal to V_(H), such as forexample, V_(H) may be 2.75 ml, V₂ and V₁ may be configured to be 2.75 mland 3.75 ml respectively so that when the dispenser 1 is placed in avertical orientation, V₂ flows into the head space volume V_(H) todefine a vertical perfume height, H between the vertical level 121 and abase of the dispenser 1. The vertical perfume height, H functions as avisual indicator demonstrating a product content and as the H reducesupon use of the dispenser 1 demonstrating start to the end of life ofthe dispenser 1. Further, at least 20%, preferably 30%, more preferably50% of a surface area of the bottom wall 12 comprising the reservoirdeep region 111 is at least partially transparent, preferablytransparent.

FIG. 6 is a side section view of a variation of a container 10 of avolatile composition dispenser 1 according to the present invention in ahorizontal orientation when placed on a support. Specifically, thecontainer 10 may comprise a third depth (D3) between the bottom wall 20and the reservoir opening plane 27 measured orthogonal to thelongitudinal axis Y_(C) and ⅗ of the length from the firstcircumferential edge 241 such that D3 is greater than D2, preferably D3is equal to D1 to define a trapezoidal profile of the bottom wall 20.

FIG. 7A is a perspective view of a variation of a container 10 of avolatile composition dispenser 1 according to the present invention in avertical orientation when placed on a support and FIG. 7B is a sidesection view of the container 10 of FIG. 7A. The container 10 of FIG. 7Ahas substantially the same features as the container of FIG. 2A anddiffers in the following additional components. Specifically, thecontainer 10 may comprise a left longitudinal axis, Y_(L) parallel tothe center longitudinal axis Y_(C) between opposing circumferentialinner edges. As shown in FIG. 2A, a center latitudinal axis X extendingalong a width of the reservoir opening plane 27 between opposingcircumferential inner edges 241, 242 and through the centroid, C forminga 90-degree angle with the center longitudinal axis (Y_(C)). A leftlongitudinal axis (Y_(L)) parallel to the center longitudinal axis(Y_(C)) between opposing circumferential inner edges 243, 244, whereinthe left longitudinal axis (Y_(L)) is located ⅖ of the width of thecenter latitudinal axis X from a third circumferential inner edge 243.Referring to FIG. 7B, a fourth depth (D4) between the bottom wall (20)and the reservoir opening plane (27) is measured orthogonal to the leftlongitudinal axis (Y_(L)) and ⅕ of the length of the left longitudinalaxis (Y_(L)) from the first circumferential inner edge (241), and afifth depth (D5) between the bottom wall (20) and the reservoir openingplane (27) is measured orthogonal to the left longitudinal axis (Y_(L))and ⅘ of the length of the left longitudinal axis (Y_(L)) from the firstcircumferential inner edge (241), wherein D4 is longer than D5.

FIG. 8A is a perspective view of a variation of a container 10 of avolatile composition dispenser according to the present invention in avertical orientation when placed on a support and FIG. 8B is a sidesection view of the container 10 of FIG. 8A. The container 10 of FIG. 8Ahas substantially the same features as the container of FIG. 7A anddiffers in the following additional components. Referring to FIG. 2A,the container 10 may also comprise a right longitudinal axis Y_(R)parallel to the center longitudinal axis (Y_(C)) between opposingcircumferential inner edges 243, 244, wherein the right longitudinalaxis (Y_(R)) is located ⅖ of the width from a fourth innercircumferential edge 244. Referring to FIG. 8B, a sixth depth D6 isbetween the bottom wall 20 and the reservoir opening plane 27. D6 ismeasured orthogonal to the right longitudinal axis (Y_(R)) and ⅕ of thelength of the right longitudinal axis (Y_(R)) from the firstcircumferential inner edge 241, and a seventh depth D7 between thebottom wall 20 and the reservoir opening plane 27 is measured orthogonalto the right longitudinal axis (Y_(R)) and ⅘ of the length of the rightlongitudinal axis (Y_(R)) from the first circumferential inner edge 241,wherein D6 is longer than D7. Although FIGS. 7A, 7B, 8A, 8B showconfigurations of a container having a protuberance 70 extending fromthe outer surface of the bottom wall 20, it will be appreciated that thecontainer can be molded in a way such that the protuberance may extendin an inward direction within the reservoir 11 to achieve similartechnical effect of preventing splash as described hereinbefore.

The dispenser 1 of the present invention can be configured for use in avariety of applications to deliver a perfume composition 12 to theatmosphere as long as the perfume composition 12 can vaporize from themembrane 13 into the air.

Accordingly, the specific physical properties of the membrane 13 may bechosen based on the specific desired use of the dispenser 1, designed tobe activated by peeling off the vapor impermeable substrate 14 or byrupturing the vapor impermeable substrate 14. Membranes and vaporimpermeable substrates designed to be releasably attached are known andwill not be further described. Examples of suitable physical parametersof the membrane 13 and the vapor impermeable substrate 14 suitable for adispenser 1 designed to be activated by rupturing the vapor impermeablesubstrate 14 will be described hereinafter in the description.

The membrane 13 may be a microporous membrane and comprise an averagepore size of about 0.01 to about 1 microns, about 0.01 to about 0.06microns, from about 0.01 to about 0.05 microns, about 0.01 to about 0.04microns, about 0.01 to about 0.03 microns, about 0.02 to about 0.04microns, or about 0.02 microns. Further, the membrane 12 may be filledwith any suitable filler and plasticizer known in the art. Fillers mayinclude finely divided silica, clays, zeolites, carbonates, charcoals,and mixtures thereof. An example of a filled membrane is an ultra-highmolecular weight polyethylene (UHMWPE) membrane filled with silica, suchas those described in U.S. Pat. No. 7,498,369. Although any suitablefill material and weight percentage may be used, typical fillpercentages for silica, may be between about 50% to about 80%, about 60%to about 80%, about 70% to about 80%, or about 70% to about 75% of thetotal weight of the membrane. Examples of suitable membrane thicknessesinclude, but are not limited to between about 0.01 mm to about 1 mm,between about 0.1 mm to 0.4 mm, about 0.15 mm to about 0.35 mm, or about0.25 mm. Still further, an evaporative surface area of the membrane 12may be about 2 cm² to about 100 cm², about 2 cm² to about 25 cm², about10 cm² to about 50 cm², about 10 cm² to about 45 cm², about 10 cm² toabout 35 cm², about 15 cm² to about 40 cm², about 15 cm² to about 35cm², about 20 cm² to about 35 cm², about 30 cm² to about 35 cm², about35 cm².

The vapor impermeable substrate 14 may be made of any material that canbe ruptured with a pre-determined applied force, with or without thepresence of an element, such as rupture element, to aid in such rupture.The planar surface may further comprise a circumferential outer edgeopposing said circumferential inner edge, to define a planar surfacearea therein between, wherein the planar surface area is configured forattaching the vapor impermeable substrate.

In embodiments where the vapor impermeable substrate 14 is intended tocontain the volatile composition when the dispenser 1 is not in use, thevapor impermeable substrate 14 may be made from any suitable barriermaterial that reduces or prevents evaporation of the perfume composition12. Such materials may be impermeable to vapors and liquids. Suitablebarrier materials for the vapor impermeable substrate 14 include, butare not limited to coated or uncoated films, such as polymeric films,webs, foils, and composite materials such as foil/polymeric filmlaminates. An example of a foil that may be used as a barrier materialis a micron aluminum foil including a nitrocellulose protective lacquer,a polyurethane primer, and a 15 g/m2 polyethylene coating (Lidfoil118-0092), available from Alcan Packaging. Suitable polymeric filmsinclude, but are not limited to, polyethylene terephtalate (PET) films,acrylonitrile copolymer barrier films such as, for example, those soldunder the tradename Barex® by INOES, ethylene vinyl alcohol films, andcombinations thereof. It is also contemplated that coated barrier filmsmay be utilized as the vapor impermeable substrate 14. Such coatedbarrier films include, but are not limited to, metallized PET, metalizedpolypropylene, silica or alumina coated film.

FIG. 10 is a side section view of components in a variation of adispenser 1 according to the present invention without the perfumecomposition. The dispenser 1 of FIG. 9 comprise substantially the samefeatures as the dispenser 1 of FIG. 1 with additional componentsdescribed as follows. Referring to FIG. 9 , the dispenser 1 comprises arupture mechanism 50 disposed between the membrane 13 and the vaporimpermeable substrate 14, wherein the rupture mechanism 50 has one ormore rupture elements 52 for rupturing the vapor impermeable substrate14.

FIG. 11 is a side section view of a variation of a dispenser 1 accordingto the present invention. The dispenser 1 of FIG. 10 comprisesubstantially the same features as the dispenser 1 of FIG. 9 withadditional components described as follows. Referring to FIG. 10 , thedispenser 1 may further comprise a housing 40 having a front cover 42and a rear frame 44, the front cover 42 and the rear frame 44 definingan interior space. The rear frame 44 is provided with a frame opening 43(hereinafter “opening”) located substantially in the centre of the rearframe 44. An actuator 45 movable relative to the housing 40 is providedfor activating the dispenser 1. The actuator 45 may be, for example, apush button 45 (hereinafter “button”) disposed within the opening 43 andis movable with respect to the rear frame 44 for enabling a user toactivate the dispenser 1. The container 10 containing the perfumecomposition 12 is located within the housing 40. The front cover 42comprises a window configured for displaying the perfume composition 12in the container 10 such that the vertical level of the perfumecomposition 12 is visible to the consumers. The dispenser 1 may furthercomprise a front plate 46 releasably attached to the front cover 42,wherein the front plate 46 may include decorative motifs for providingan aesthetic effect to the dispenser 1. The front plate 46 may bepartially transparent to enable viewing of the vertical level of theperfume composition 12

Perfume Composition

The dispenser 1 of the present invention may comprise an air fresheningcomposition, wherein the air freshening composition comprise up to 100%,about 4% to about 100%, about 15% to about 100%, about 65% to 86%, ofthe perfume composition 12 by weight of the air freshening composition.

The perfume composition 12 may comprise a viscosity of from about 1.0 cPto less than about 25 cP, preferably about 1.0 cP to less than about 20cP, at 25 degrees Celsius.

The perfume composition 12 may comprise a mixture of carbonyl containingcompounds. The mixture of carbonyl containing compounds may be presentin an amount of from about equal to or greater than 0.01% to about lessthan or equal to 100%, in an amount from about 0.01% to 50%, from about1% to 40%, from about 4% to 25%, from about less than or equal to 5% toequal to or less than 25% by weight of the perfume composition. Aneffect of having less than 25% by weight of the carbonyl containingcompounds is to enable formulation space for adding optional ingredientsdescribed hereinafter such as perfume raw materials to provide a hedonicexperience.

The vapor pressure of the volatile carbonyl containing compounds may begreater than or equal to 0.025 torr, about 0.025 torr to about 30 torr,measured at 25 degrees Celsius. The vapor pressure of individualvolatile carbonyl containing compounds can be calculated using theAdvanced Chemistry Development Labs (“ACD”) (Toronto, Canada) VPcomputational model, version 14.02 providing vapor pressure (VP) valuesat 25 degrees Celsius expressed in unit of torr. The volatile carbonylcontaining compound may be selected from the group consisting of:volatile aldehydes, ketones and mixtures thereof. Exemplary volatilealdehydes and ketones are listed in the following description and arenamed according to the method of naming organic chemical compounds asrecommended by the International Union of Pure and Applied Chemistry(IUPAC).

The carbonyl containing compound may comprise volatile aldehydes.Aldehydes that are partially volatile may be considered a volatilealdehyde as used herein. Exemplary volatile aldehydes which may be usedinclude, but are not limited to, aldehydes as shown in Table 1 below.The carbonyl containing compound may also comprise ketones. Exemplaryketones which may be used in the volatile material include, but are notlimited to ketones shown in Table 2 below.

TABLE 1 Vapor Pressure (torr) CAS IUPAC Name @ 25 degrees Celsius04-55-2 (E)-3-phenylprop-2-enal 0.080 100-52-7 Benzaldehyde 0.13122-03-2 4-propan-2-ylbenzaldehyde 0.031 123-11-5 4-methoxybenzaldehyde0.021 557-48-2 (2E,6Z)-nona-2,6-dienal 0.18 6728-26-3 (E)-hex-2-enal10.66 5392-40-5 (2E)-3,7-dimethylocta-2,6-dienal 0.13 2363-89-5(E)-oct-2-enal 0.99 21662-13-5 (2E,6Z)-dodeca-2,6-dienal 0.004 2463-53-8non-2-enal 0.21 1335-66-6 2,4,6-trimethylcyclohex-3- 2.64ene-1-carbaldehyde; 3,5,6- trimethylcyclohex-3-ene-1- carbaldehyde33885-52-8 3-(6,6-dimethyl-4- 0.028 bicyclo[3.1.1]hept-3-enyl)-2,2-dimethylpropanal 124-19-6 Nonanal 0.37 65405-70-1 (E)-dec-4-enal0.35 106-72-9 2,6-dimethylhept-5-enal 0.48 2277-19-2 (Z)-non-6-enal 0.223613-30-7 7-methoxy-3,7-dimethyloctanal 0.040 6784-13-03-(4-methylcyclohex-3-en- 0.11 1-yl)butanal 106-23-03,7-dimethyloct-6-enal 0.14 19009-56-4 2-methyldecanal 0.053 68039-49-62,4-dimethylcyclohex-3-ene-1- 0.73 carbaldehyde 112-45-8 undec-10-enal0.019 71077-31-1 4,8-dimethyldeca-4,9-dienal 0.019 124-13-0 Octanal 1.14112-44-7 Undecanal 0.037 112-31-2 Decanal 0.12 143-14-6 undec-9-enal0.011 62439-41-2 6-methoxy-2,6-dimethylheptanal 0.130 33885-51-73-(6,6-dimethyl-4- 0.039 bicyclo[3.1.1]hept-3-enyl)propanal

TABLE 2 Vapor Pressure (VP), CAS IUPAC Name torr @ 25° C. 1125-21-92,6,6-trimethylcyclohex-2-ene-1,4-dione 0.158 10373-78-14,7,7-trimethylbicyclo[2.2.1]heptane-2,3-dione 0.0817 1193-79-91-(5-methylfuran-2-yl)ethanone 0.301 765-70-83-methylcyclopentane-1,2-dione 0.978 98-86-2 1-phenylethanone 0.299600-14-6 pentane-2,3-dione 26.416 4077-47-84-methoxy-2,5-dimethylfuran-3-one 0.103 3658-77-34-hydroxy-2,5-dimethylfuran-3-one 0.032 1196-01-6(1S,5S)-2,6,6-trimethylbicyclo[3.1.1]hept-2-en-4-one 0.0773 18309-32-5(1R,5R)-2,6,6-trimethylbicyclo[3.1.1]hept-2-en-4-one 0.0773 78-59-13,5,5-trimethylcyclohex-2-en-1-one 0.15 2758-18-13-methylcyclopent-2-en-1-one 2.741 2244-16-8(5S)-2-methyl-5-prop-1-en-2-ylcyclohex-2-en-1-one 0.0656 6485-40-1(5R)-2-methyl-5-prop-1-en-2-ylcyclohex-2-en-1-one 0.0656 141-79-74-methylpent-3-en-2-one 8.757 99-49-02-methyl-5-prop-1-en-2-ylcyclohex-2-en-1-one 0.0656 1072-83-91-(1H-pyrrol-2-yl)ethanone 0.11 89-82-7(5R)-5-methyl-2-propan-2-ylidenecyclohexan-1-one 0.0934 2550-26-74-phenylbutan-2-one 0.0557 2308-18-1 3-methylbutyl 3-oxobutanoate 0.167513-86-0 3-hydroxybutan-2-one 1.92 81786-73-4(Z)-3,4,5,6,6-pentamethylhept-3-en-2-one 0.0275 4906-24-53-oxobutan-2-yl acetate 2.069 105-45-3 methyl 3-oxobutanoate 1.543141-97-9 ethyl 3-oxobutanoate 0.89 5524-05-0(2R,5R)-2-methyl-5-prop-1-en-2-ylcyclohexan-1-one 0.107 7764-50-32-methyl-5-prop-1-en-2-ylcyclohexan-1-one 0.107 5948-04-9(2S,5S)-2-methyl-5-prop-1-en-2-ylcyclohexan-1-one 0.107 55739-89-42-ethyl-4,4-dimethylcyclohexan-1-one 0.25 25304-14-71-(3,3-dimethylcyclohexyl)ethanone 0.287 36977-92-1(2S,5S)-5-methyl-2-propan-2-ylcyclohexan-1-one 0.256 89-80-5(2S,5R)-5-methyl-2-propan-2-ylcyclohexan-1-one 0.256 65443-14-32,2,5-trimethyl-5-pentylcyclopentan-1-one 0.0261 873-94-93,3,5-trimethylcyclohexan-1-one 0.582 4884-24-62-cyclopentylcyclopentan-1-one 0.0588 546-80-5(1S,4R,5R)-4-methyl-1-propan-2- 0.323 ylbicyclo[3.1.0]hexan-3-one16587-71-6 4-(2-methylbutan-2-yl)cyclohexan-1-one 0.0649 76-22-24,7,7-trimethylbicyclo[2.2.1]heptan-3-one 0.225 110-93-06-methylhept-5-en-2-one 1.277 111-13-7 octan-2-one 1.725 7787-20-4(1S,4R)-2,2,4-trimethylbicyclo[2.2.1]heptan-3-one 0.463 110-43-0heptan-2-one 4.732 1195-79-5 2,2,4-trimethylbicyclo[2.2.1]heptan-3-one0.463 541-85-5 5-methylheptan-3-one 2.444 106-68-3 octan-3-one 1.504

Table 3 shows a mixture of volatile aldehydes suitable for use in thedispenser 1 of the present invention, the mixture is referred to hereinas Accord A.

TABLE 3 Accord A Weight % by weight of the VP (torr) CAS No. MaterialName Volatile Material @ 25° C. 6728-26-3 (E)-hex-2-enal 1 to 4 10.661335-66-6 2,4,6-trimethylcyclohex-3- 4 to 8 2.64 ene-1-carbaldehyde;3,5,6- trimethylcyclohex-3-ene-1- carbaldehyde 124-13-0 octanal  7 to 121.14 68039-49-6 2,4-dimethylcyclohex-3- 10 to 20 0.73 ene-1-carbaldehyde106-72-9 2,6-dimethylhept-5-enal 10 to 20 0.48 2277-19-2 (Z)-non-6-enal0.1 to 0.3 0.22 557-48-2 (2E,6Z)-nona-2,6-dienal 0.3 to 1.0 0.18100-52-7 benzaldehyde  8 to 13 0.13 5392-40-5 (2E)-3,7-dimethylocta-2,6- 7 to 12 0.13 dienal 112-31-2 decanal 10 to 20 0.12 30772-79-34,7-Methanoindan-1- 10 to 20 0.05 carboxaldehyde Total by weight of the100% Volatile Material

Table 4 shows a further mixture of volatile aldehydes suitable for usein the dispenser of the present invention, the mixture is referred toherein as Accord B.

TABLE 4 Accord B Wt % by weight of the VP (torr) CAS Material NameVolatile Material @ 25° C. 6728-26-3 (E)-hex-2-enal 0.5 to 2.0 10.66124-13-0 octanal  3 to 10 1.14 110-41-8 2-methylundecanal 1 to 5 0.015100-52-7 benzaldehyde 10 to 20 0.13 106-72-9 2,6-dimethylhept-5-enal 3to 8 0.48 68039-49-6 2,4-dimethylcyclohex-3-  9 to 15 0.73ene-1-carbaldehyde 124-19-6 nonanal 1 to 3 0.37 1335-66-62,5,6-trimethylcyclohex-3-  5 to 10 2.64 ene-1-carbaldehyde 557-48-2(2E,6Z)-nona-2,6-dienal 0.2 to 1.2 0.182 112-31-2 decanal  7 to 15 0.125392-40-5 (E)-3,7-dimethylocta-2,6- 10 to 20 0.13 dienal 112-45-8undec-10-enal 1 to 5 0.019 112-54-9 dodecanal 1 to 6 0.007 123-11-54-methoxybenzaldehyde 10 to 20 0.021 Total by weight of the 100%Volatile Material

The following examples are intended to more fully illustrate the presentinvention and are not to be construed as limitations of the presentinvention since many variations thereof are possible without departingfrom the scope of the present invention. All parts, percentages andratios used herein are expressed as percent weight unless otherwisespecified.

EXAMPLES

Test equipment/materials and test dispenser samples are first describedunder Materials, then the Test Method is provided, and lastly resultsare discussed. Data is provided demonstrating the dispensers of thepresent invention having improved splash control and achieves a desiredvertical fill height. Equipment and materials used in the Test Methoddescribed hereinafter are listed in Table 5 below. The perfumecompositions provided in the inventive and comparative samples areprepared using conventional methods. FIG. 9 shows a configuration of aconventional dispenser 90 used as a comparative sample in the test. Asshown in FIG. 9 , the conventional dispenser 90 differ from thedispenser 1 of FIG. 5A in that the conventional dispenser 90 has acontainer 92 having side walls 91 of uniform height and an uniform depth(D) between a bottom wall 94 and a reservoir opening plane 96 of thecontainer 92, wherein a height of the side walls 91 and D is measuredorthogonal to a longitudinal axis (L) of the container 92.

Materials

TABLE 5 Equipment/Materials Equipment/ Materials TechnicalSpecifications Conveyor Belt Monolab Main Automatic MachineManufacturer: Monolab Model: MB961XL Serial Number: B2.09.009 PerfumeTechnical Specifications are not disclosed by the Filling manufacturer.Filling station comprising a nozzle Station in fluid communication witha tank containing a perfume composition Perfume Perfume compositionhaving a viscosity of from Composition 1.0 cp to less than 25 cp at 25degrees Celsius. for Perfume Filing Station Comparative ConventionalDispenser with configuration based on Sample #1 FIG. 9 with perfumecomposition having a viscosity of from 1.0 cp to less than 25 cp at 25degrees Celsius. Comparative Conventional Dispenser with configurationbased on Sample #2 FIG. 9 with perfume composition having a viscosity offrom 1.0 cp to less than 25 cp at 25 degrees Celsius. InventiveInventive Dispenser with configuration based on Sample #3 FIG. 5A withperfume composition having a viscosity of from 1.0 cp to less than 25 cpat 25 degrees Celsius.

Test Method

Perfume Fill Performance Test Method

This test method is to determine a maximum line speed for containerscontaining perfume composition and having different head space volumesor head space gap between the perfume surface level and the reservoiropening plane. The test method is performed under the following testconditions: at an average temperature of 20° C. to 25° C. The steps forperforming the test are illustrated in FIGS. 4A to 4C and include:

-   -   1) positioning a container on a pallet;    -   2) moving the pallet comprising the container on a conveyor belt        to a filling station comprising a nozzle in fluid communication        with a tank containing a perfume composition;    -   3) attaching a vapor impermeable substrate to the container        comprising the dispensed perfume composition; and    -   4) attaching a membrane to form a dispenser.

Example

Comparative Samples #1, #2 and Inventive Sample #3 of Table 5 areevaluated according to the Perfume Fill Performance Test Methoddescribed hereinbefore under Test Method.

Table 6 shows a correlation between the head space 17 in the dispenser 1and a maximum line speed without perfume splash (cycles/minute) toachieve a desired vertical level in the perfume composition 12.

TABLE 6 Total Total Perfume Vertical Visual internal Fill Volume asMaximum Height reservoir Total a % of a total line speed (Perfume Fillvolume of Perfume Fill internal reservoir (cycles/minute) with Level ina Vertical the Volume volume of the Total Head no splash Orientation ofthe Example reservoir, V_(r) (ml) reservoir, V_(r) Space Volume detectedDispenser Comparative 10.5 ml 6.5 ml 60% 4 ml 20 39.7 mm Sample #1Comparative 10.5 ml 7.2 ml 70% 3.3 ml 17 ≥42.4 mm Sample #2 Inventive10.5 ml 6.5 ml 60% 4 ml 20 ≥42.4 mm Sample #3

As shown in Table 6, the results of Inventive Sample #3 demonstrate thathaving a configuration of the container 10 in the Inventive Sample #3and enables an optimum total head space volume of 4 ml to prevent splashand achieves a vertical visual height of greater than or equal to 42.4mm when Inventive Sample #3 is placed in a vertical orientation.Further, the production of Inventive Sample #3 is achieved at a maximumspeed of 20 cycles/minute to optimize production output. The results ofComparative Sample #1 show a lower vertical visual height of 39.7 mmcompared to Inventive Sample #3 even with the same perfume fill volumeof 6.5 ml and the same head space volume of 4 ml. On the other hand, theresults of Comparative Sample #2 show the same vertical visual height of42.4 mm, but the line speed is reduced to 17 cycles per minute in orderto prevent splash.

The overall results show that having a container 10 of the presentinvention having a first depth (D1) and a second depth (D2) between thebottom wall 20 and the reservoir opening plane 27 wherein D1 is longerthan D2 helps prevent perfume splash and achieves a desired verticalvisual height requirement than a configuration without D1 and D2,despite maintaining all other conditions such as demonstrated inComparative Sample #1. Therefore, a container having D1 and D2 asdescribed hereinbefore may be used to prevent the effect of splash inmanufacturing while achieving high production output of dispensers whichmeet the visual vertical height requirements.

The dimensions and values disclosed herein are not to be understood asbeing strictly limited to the exact numerical values recited. Instead,unless otherwise specified, each such dimension is intended to mean boththe recited value and a functionally equivalent range surrounding thatvalue. For example, a dimension disclosed as “40 mm” is intended to mean“about 40 mm.”

Every document cited herein, including any cross referenced or relatedpatent or application and any patent application or patent to which thisapplication claims priority or benefit thereof, is hereby incorporatedherein by reference in its entirety unless expressly excluded orotherwise limited. The citation of any document is not an admission thatit is prior art with respect to any invention disclosed or claimedherein or that it alone, or in any combination with any other referenceor references, teaches, suggests or discloses any such invention.Further, to the extent that any meaning or definition of a term in thisdocument conflicts with any meaning or definition of the same term in adocument incorporated by reference, the meaning or definition assignedto that term in this document shall govern.

While particular embodiments of the present invention have beenillustrated and described, it would be obvious to those skilled in theart that various other changes and modifications can be made withoutdeparting from the spirit and scope of the invention. It is thereforeintended to cover in the appended claims all such changes andmodifications that are within the scope of this invention.

What is claimed is:
 1. A method of manufacturing a volatile composition dispenser, the process comprising the steps of: (i) positioning a container on a pallet, wherein the container comprises a bottom wall and side walls extending circumferentially around the bottom wall to define a reservoir wherein the side walls have a circumferential inner edge defining a reservoir opening, wherein the container is positioned on the pallet exposing the reservoir opening, wherein the container includes a planar surface radially projecting outward from said circumferential inner edge; wherein the reservoir opening comprises a reservoir opening plane having a center longitudinal axis (Yc) extending along a length (L) of the reservoir opening plane between opposing circumferential inner edges and through a centroid of the reservoir opening plane; wherein a first depth (D1) between the bottom wall and the reservoir opening plane is measured orthogonal to the center longitudinal axis and 1/5 of the length (L) from a first circumferential inner edge, and a second depth (D2) between the bottom wall and the reservoir opening plane is measured orthogonal to the center longitudinal axis and 4/5 of the length from the first circumferential inner edge such that the first depth (D1) is longer than the second depth (D2); (ii) moving the pallet comprising the container on a conveyor belt to a filling station comprising a nozzle in fluid communication with a tank containing a perfume composition; (iii) dispensing, at the filling station, the perfume composition through the reservoir opening into the reservoir of the container; and (iv) attaching a vapor impermeable substrate to the planar surface of the container containing the dispensed perfume composition.
 2. The method according to claim 1, further comprising step (v) of attaching a porous membrane to the container across the reservoir opening.
 3. The method according to claim 1, wherein the vapor impermeable substrate is a rupturable vapor impermeable substrate.
 4. The method according to claim 3, wherein said rupturable vapor impermeable substrate is disposed between the porous membrane and the reservoir opening.
 5. The method according to claim 1, wherein the conveyor belt is operated at a line speed of greater than or equal to 14 cycles per minute.
 6. The method according to claim 1, wherein the conveyor belt is operated at a line speed of 14 to 20 cycles per minute.
 7. The method according to claim 1, wherein the conveyor belt is operated at a line speed of 16 to 20 cycles per minute.
 8. The method according to claim 1, wherein the conveyor belt is operated at a line speed of 18 to 20 cycles per minute.
 9. The method according to claim 1, wherein step (iii) comprises filling the perfume composition to a total perfume fill volume (V_(FILL)) of 75% of a total internal reservoir volume (V_(r)) of the reservoir, where the total internal reservoir volume (V_(r))=a Surface Area (SA) of the reservoir opening multiplied by an Average Depth (Avg. D.) of the reservoir.
 10. The method according to claim 1, wherein step (iii) comprises filling the perfume composition to a total perfume fill volume (V_(FILL)) of 65% of a total internal reservoir volume (V_(r)) of the reservoir, where the total internal reservoir volume (V_(r))=a Surface Area (SA) of the reservoir opening multiplied by an Average Depth (Avg. D.) of the reservoir.
 11. The method according to claim 1, wherein a headspace between the reservoir opening plane and the perfume composition has a headspace volume of at least 25% of a total internal reservoir volume (V_(r)) of the reservoir, where the total internal reservoir volume (V_(r))=a Surface Area (SA) of the reservoir opening multiplied by an Average Depth (Avg. D.) of the reservoir.
 12. The method according to claim 1, wherein a headspace between the reservoir opening plane and the perfume composition has a headspace volume of at least 35% of a total internal reservoir volume (V_(r)) of the reservoir, where the total internal reservoir volume (V_(r))=a Surface Area (SA) of the reservoir opening multiplied by an Average Depth (Avg. D.) of the reservoir.
 13. The method according to claim 1, wherein a third depth (D3) between the bottom wall and the reservoir opening plane is measured orthogonal to the center longitudinal axis (Yc) and 3/5 of the length (L) such that the third depth (D3) is less than the first depth (D1) and greater than the second depth (D2) to define a sloped profile of the bottom wall.
 14. The method according to claim 1, wherein a third depth (D3) between the bottom wall and the reservoir opening plane is measured orthogonal to the center longitudinal axis (Yc) and 3/5 of the length (L) such that the third depth (D3) is greater than the second depth (D2).
 15. The method according to claim 1, wherein the side walls include a first side wall and a second side wall opposing each other, wherein the first side wall is directly adjacent to said first circumferential inner edge and the second side wall is directly adjacent to a second circumferential inner edge, wherein the center longitudinal axis (Yc) intersects the first circumferential inner edge and the second circumferential inner edge wherein a height of the first side wall is measured orthogonal to an intersection of the center longitudinal axis and the first inner circumferential edge and a height of the second side wall is measured orthogonal to an intersection of the center longitudinal axis and the second inner circumferential edge, wherein the height of the first side wall is longer than the height of the second side wall.
 16. The method according to claim 1, comprising a total perfume fill volume (V_(FILL)) of from about 4 ml to 30 ml.
 17. The method according to claim 1, comprising a total perfume fill volume (V_(FILL)) of from about 6 ml to 20 ml. 